Home / 19,720.86-29,581.55-5,681.12

Finding the Fourth Proportional to 19,720.86, 29,581.55 and 5,681.12

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Solution

The fourth proportional to 19,720.86, 29,581.55 and 5,681.12 is: 8,521.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.86 : 29,581.55 = 5,681.12 : x
  2. Step 2: Convert to fraction form
    19,720.86/29,581.55 = 5,681.12/x
  3. Step 3: Cross multiply
    19,720.86x = 29,581.55 × 5,681.12
  4. Step 4: Simplify right side
    19,720.86x = 168,056,159.02
  5. Step 5: Solve for x
    x = 168,056,159.02/19,720.86
  6. Step 6: Final answer
    x = 8,521.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.